Step 1: Stop Immediately

If you realize you've put the wrong fuel in your vehicle before starting the engine, you're in the best possible situation. Do not start the engine under any circumstances.

Step 2: Contact a Certified Operator

Immediately contact a NZIFDA-certified operator. They have the expertise and equipment to properly remediate the misfuel without starting the engine.

Step 3: Arrange Safe Transport to Fixed Facility

IMPORTANT: All remediation must occur at a certified fixed facility. Fuel station forecourts are classified as Hazardous Atmosphere Zones under the HSW (Hazardous Substances) Regulations 2017 — mechanical work is prohibited. Public roads and driveways lack the containment required under the Resource Management Act 1991. And any operator transporting contaminated fuel commercially requires full Dangerous Goods compliance under the Land Transport Rule 2005 — regardless of quantity. Arrange for towing to the operator's certified fixed facility. Do not attempt to start the engine to move the vehicle.

Step 4: Professional Remediation at Fixed Facility

At the certified fixed facility, the operator will use the manufacturer-prescribed procedure for your specific vehicle:

• Fuel pump access panel removal — accessing the tank through the manufacturer-provided access panel (under rear seat or boot floor) to remove fuel through the pump opening, OR
• Full tank removal — complete fuel tank drop per the manufacturer's service manual for full system decontamination
• Flush the fuel system completely and remediate to manufacturer specification
• Replace affected components (fuel filter, seals, gaskets) as required
• Issue an NZIFDA Certificate of Compliance documenting the method used
• Ensure compliant waste tracking and disposal per MfE guidelines

Why these methods? Every vehicle manufacturer — Toyota, VW/Audi, BMW, Mercedes, Ford, Hyundai/Kia, Nissan, Mazda, GM, and all others — prescribes fuel pump access or tank removal. No manufacturer prescribes filler neck extraction. Modern vehicles contain anti-siphon devices (FMVSS 301) that make filler neck access both damaging and incomplete.

⚠️ Critical: All remediation must occur at a certified fixed facility with proper containment and hazardous substance handling infrastructure. Fuel station forecourts are Hazardous Atmosphere Zones where mechanical work is prohibited. Roadside and driveway locations cannot meet RMA discharge or containment requirements.

Immediate Actions

If you've already started the engine with the wrong fuel:

1. Turn off the engine immediately - Do not continue driving
2. Turn off the ignition
3. Move the vehicle to a safe location if possible (only if it's safe to do so)
4. Contact a certified operator immediately

Warning: Starting the engine circulates contaminated fuel throughout the entire fuel system, causing extensive damage. Repair costs will be significantly higher.

What to Expect

If the engine has been started, the remediation process will be more extensive:

• Complete contaminated fuel removal and system flushing
• Replacement of fuel pump, injectors, and filters
• System cleaning and component replacement
• Testing and verification
• Higher costs due to increased damage

Avoid These Mistakes

• Do NOT start the engine — This is the most critical rule. Starting the engine circulates contaminated fuel through injectors, pumps, and filters, dramatically increasing damage and cost.
• Do NOT attempt to drain fuel yourself — Modern vehicles contain anti-siphon devices (rollover valves, mesh screens, complex filler neck geometry) mandated by FMVSS 301. Forcing equipment through the filler neck damages safety-critical components.
• Do NOT allow filler neck extraction — No vehicle manufacturer prescribes this method. It damages anti-siphon devices, cannot fully remove contaminated fuel due to tank baffles, voids fuel system warranty, and may invalidate your insurance claim. Ask your operator: "Will you use fuel pump access or tank removal?"
• Do NOT add more of the correct fuel — This won't help and may cause more damage. The contamination must be fully removed.
• Do NOT use unqualified operators — Only use operators displaying the NZIFDA Mark. Uncertified operators typically use non-OEM methods, carry no professional indemnity insurance, and cannot provide the documentation insurers require.
• Do NOT delay — Contact a certified operator immediately. The longer contaminated fuel sits in the system, the greater the potential for component damage.

Before Engine Start

If the engine has NOT been started, remediation costs are typically lower as damage is limited to the fuel tank and lines.

After Engine Start

If the engine HAS been started, costs are significantly higher due to damage to:

• Fuel pump
• Fuel injectors
• Fuel filters
• Fuel lines
• Potentially the engine itself